From DT wiki "All MiniTouch boards have a function key to the left of the control key and reduced size function keys. The mechanical models have a backwards 'L' enter key, and a single blank key on the end of row 2. Keycaps can be dye sublimated or lasered; some keyboards have a blue num lock legend, and some have blue legends for the embedded numeric keypad. No clear pattern is yet known."
Mine have monterey, no blue sub legends, and lasered caps. Maybe the difference is between laser or dyesub caps?